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Water-soluble compound nitrogen fertilizer and preparation method

A nitrogen fertilizer and water-soluble technology, applied in the direction of nitrogen fertilizer, fertilization equipment, fertilizer mixture, etc., can solve problems such as unfavorable operation, high concentration of 98%, easy to block pipes, and block equipment

Inactive Publication Date: 2015-06-10
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high concentration of 98% is easy to block pipes and equipment, which is not conducive to operation

Method used

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  • Water-soluble compound nitrogen fertilizer and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take the current high-efficiency and low-consumption high-tower granulation as an example. The daily output is 1,000 tons. The ammonium nitrate device is concentrated to about 85% high-temperature ammonium nitrate solution. The temperature of the ammonium nitrate solution is 120°C. At the same time, after the ammonium sulfate is heated, it is transported and metered by a screw, and then added to the continuous mixing reactor. The mass ratio of ammonium sulfate to ammonium nitrate is 60:40, and the temperature of the continuous mixing reactor is controlled at 160°C for 10 minutes to promote the reaction of ammonium sulfate and ammonium nitrate to form a stable double salt of ammonium sulfur nitrate. Add 0.5% of the total mass of PH regulator sodium carbonate and 0.5% of the internal desiccant calcium nitrate into the continuous mixing tank with heating, further concentrate, control the water content of the slurry to ≤1%, and then granulate through a high tower to obtain s...

Embodiment 2

[0038] The ammonium nitrate plant is concentrated to about 95% high-temperature ammonium nitrate solution at a temperature of 170°C. After being transported and metered by pipeline, it is added to the continuous mixing reactor. . The mass ratio of ammonium sulfate to ammonium nitrate is 40:60, and the temperature of the continuous mixing reactor is controlled at 210°C for 3 minutes to promote the reaction of ammonium sulfate and ammonium nitrate to form a stable double salt of ammonium sulfur nitrate. Add 10% of the total mass of PH regulator sodium bicarbonate and 15% of the internal desiccant magnesium sulfate into the continuous mixing tank with heating, further concentrate, control the water content of the slurry to ≤1%, and then granulate through discs to obtain stable water-soluble compound nitrogen fertilizer.

[0039] The ammonium sulfate is ammonium sulfate solid or solution.

[0040] The ammonium sulfate is added into the reactor after preheating, and the temperatu...

Embodiment 3

[0042] The ammonium nitrate unit is concentrated to about 82% ammonium nitrate solution at room temperature, which is transported and metered through pipelines and fed into the continuous mixing reactor. The mass ratio of ammonium sulfate to ammonium nitrate is 51:49. The temperature of the continuous mixing reactor is controlled at 210°C for 3 minutes to promote the reaction of ammonium sulfate and ammonium nitrate to form a stable double salt of ammonium sulfur nitrate. Put the reacted ammonium sulfur nitrate double salt into the mixing tank, then add 10% of the pH regulator sodium bicarbonate of the total mass, and 15% of the internal desiccant magnesium sulfate into the mixing tank, further concentrate, and control the water content of the slurry. ≤1%, and then granulated by disk to obtain stable water-soluble compound nitrogen fertilizer. Wherein ammonium sulfate can be ammonium sulfate solid or solution.

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Abstract

The invention relates to the field of agricultural chemical fertilizers, and specifically relates to a water-soluble compound nitrogen fertilizer. The water-soluble compound nitrogen fertilizer is characterized in that a formula is prepared from the following components: ammonium nitrate, ammonium sulfate, a pH regulator and an inner drying agent; the mass ratio of ammonium sulfate to ammonium nitrate is (60-40): (40-60); the compound nitrogen fertilizer contains 0.5 to 10% of pH regulator and 0.5 to 15% of inner drying agent based on the total mass of the compound nitrogen fertilizer. The preparation method comprises the steps of concentrating an ammonium nitrate solution; adding ammonium sulfate; controlling the reaction conditions to generate stable combined nitrogen complex salt; adding the pH regulator and the inner drying agent; further evaporating and concentrating; granulating and cooling to obtain the water-soluble compound nitrogen fertilizer. The water-soluble compound nitrogen fertilizer has the advantages of being explosion-proof, resistant to store, and scientific in mixing ratio; meanwhile, the water-soluble compound nitrogen fertilizer contains nitrate nitrogen, ammonium nitrogen and sulphur element, and is particularly suitable for various nitrophilous and thiophilic crops; the preparation method does not change the technological conditions of the existing ammonium nitrate neutralization reactor, and is stable to produce, and simple to operate.

Description

technical field [0001] The invention relates to the field of agricultural chemical fertilizers, in particular to a stable water-soluble compound nitrogen fertilizer and a preparation method thereof. Background technique [0002] Ammonium sulfate and ammonium nitrate are commonly used fertilizers. Ammonium sulfate contains ammonium nitrogen and is mainly used in agriculture. It has low hygroscopicity, is not easy to agglomerate, has stable physical and chemical properties, and can also provide sulfur for plants. However, ammonium sulfate belongs to Physiologically acidic fertilizers, long-term application will increase soil acidity and cause soil compaction. Ammonium nitrate can provide ammonium nitrogen and nitrate nitrogen to crops at the same time. It has the characteristics of fast fertilizer efficiency, but it is easy to absorb moisture and agglomerate. It is prone to explosion when it is heated or impacted during transportation. The country prohibits the use of ammoni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05C1/00C05G3/00
Inventor 李刚陈刚刘朝慧唐志有肖羲刘胜
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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